Large images slow down websites, make emails heavy and fail upload limits. The good news: most images can be made much smaller with no visible difference. These four steps, in this order, give the biggest savings.

1. Use the size you actually need

The biggest saving usually comes from dimensions, not compression. A 4000 px wide photo shown in a 1200 px wide space wastes most of its pixels.

In the image resizer, set the width you need (the height follows the image's shape), or pick a preset such as an email width. Images already smaller than the target keep their size; the resizer never enlarges them unless you ask.

2. Compress with a sensible quality

For JPG and WebP, a quality around 70–85 is usually indistinguishable from the original at normal viewing size. The image compressor offers three levels:

  • Light: the highest quality, the smallest saving;
  • Balanced: a good default for most images;
  • Strong: the smallest files, for when size matters most.

Use the before-and-after slider to check the result at full size. The saving shown is measured from the real file, and if a file can't be made smaller in its format, you get your original back instead of a bigger file.

3. Choose the right format

A photo saved as PNG can be many times larger than the same photo as JPG or WebP. If your image is a photo and doesn't need transparency, converting it to JPG or WebP is often the single biggest saving. See PNG, JPG or WebP for how to choose.

4. Set a maximum file size

Some platforms have upload limits, for example "images must be under 2 MB". In the resizer and compressor, choose Max file size (or type any value). Each image then gets the highest quality that fits: small images keep full quality, large ones are reduced only as much as needed. With the Auto format, a photo saved as PNG that can't fit is saved as a high-quality JPG instead, which looks far better than a heavily reduced PNG.

Summary

  1. Resize to the dimensions you need.
  2. Compress at a sensible quality and check the result.
  3. Use JPG or WebP for photos.
  4. Set a maximum file size when a platform requires one.